A lot of variables go into selecting the proper wax for containers including
but not limited to the diameter of the container you will be filling, location
of your facility and intentions for using the wax for other applications.
Generally the ideal wax for filling containers is one with a melt point
between 121-130 F. The use of these waxes is generally divided equally with
half of the manufacturers using the low end of the melt point and the other
half using the higher end closer to 130F.

The 121 melting point works well because it allows you to fill larger diameter
containers without having much difficulty getting a single wick to burn
all the way out to the sides. However, the 121 F wax can create problems
during the summer months with the wax and/or candles "hot melting" in trucks
and warehouses. The 129 melt point eliminates the hot melting but in some
instances on large diameter containers, with high fragrance load/dark colors
may have difficulty getting a wick to burn all the way to the sides. Our
conclusion is that there is nothing wrong with using either wax. You should
select one that best suites your needs.